Intolerance of uncertainty has been related to increased worry in recent conceptual models of Generalized Anxiety Disorder (GAD). The present study examines the relationship between a measure of intolerance of uncertainty, the Intolerance of Uncertainty scale (IU), and behaviors associated with GAD, such as slowness of execution and amount of evidence required before decision making. A total of 49 individuals participated in the study. Three experimental tasks varying in level of ambiguity and difficulty were used. The analyses show a positive correlation between scores on the IU and number of cues required before responding in a moderately ambiguous inference task. However, scores on the IU were not significantly related to responses in an unambiguous task (regardless of the level of difficulty) or in a highly ambiguous task. The results suggest that high worriers have a lower threshold of tolerance of uncertainty for intermediate levels of ambiguity. The results are discussed in terms of theoretical models of GAD.
Background: The goal of the present study was to validate the French version of the Agoraphobic Cognitions Questionnaire (ACQ). Methods: Subjects consisted of 115 patients with panic disorder and agoraphobia, 54 obsessive-compulsive patients and 72 normal controls. Patients were referred for outpatient treatment. They filled in the questionnaire before and after entering treatment. The control group consisted of people taken from the general population. It was matched with the clinical groups on age, sex and education. Results: The ACQ appears to have a constant factor structure across US, Dutch and French samples. Results support the validity of the total score of the ACQ. Patients with panic disorder and agoraphobia scored significantly higher than obsessive-compulsive patients and control subjects. On the ACQ physical concerns subscale agoraphobic patients were significantly different from obsessive-compulsive patients and control subjects. On the social/behavioural subscale agoraphobic patients and obsessive-compulsive patients were significantly different from control subjects. The French translation of the ACQ was found to be stable over an interval of 15 days in the control group. The Cronbach coefficients of both subscales were also satisfactory. These results support the stability and the internal consistency of the questionnaire. In addition, the French translation of the ACQ was sensitive to changes with cognitive-behavioural therapy. Conclusions: These results support the findings of Chambless and Gracely [Cogn Ther Res 1989;13:9–20]. The ACQ physical concerns subscale is a specific feature for the anxiety status experienced by patients with panic disorder and agoraphobia. The ACQ social/behavioural subscale seems to be a more general feature of anxious patients.
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